Furnace



O. N. SELLERS July 18, 1933.

FURNACE Filed April 13, 1931 lill/I4 r .we n n .Alllllllllrnlnlnlall .I ih# vill 272 vevzr/ Patented July 18, 1933 UNI'IE STATES ORLIN N. SELLERS, OF EVANSTON, ILLINOIS ruRNacE Application led April 13,

My invention relates more particularly to gas-fired furnaces either originally construct-v ing from combustion pass, as for example to heat the water in case of a boiler furnace, should, for economical operation, be of less effective cross-sectional area than the similar Hues of coal-fired furnaces. Furthermore, it costs less to manufacture boilers having large lines than small flues.

One of my objects is to provide for the economical and effective operation of gasfired furnaces the gas-iiuesof which are of unduly large cross-sectional area, by reducingtheir eective cross-sectional area and utilizing, to the best advantage, thel heat applied thereto.

Another obj ect is to provide for the ready conditioning of a large-flue furnace for economical operation by gas.

Another object is to provide means to reduce the effective cross-sectional area of the large flues, which may be readily removed from and replaced in, the flues, as for example when the structure requires cleaning.

, Another object is to provide the desired scrubbing action on the gases in their passage through the fiues, and th-e'reducing of the velocity of the gas-travel while permitting ofthe free ventingV of the gases from the flues.

ploying means insertable into the dues of the furnace to reduce their effective cross-sectional area, of such construction that danger of disarrangement of these means inf the shipping or handling of the furnace will be avoided; and other objects as will bey manifest from the following description.

Referring to the accompanying drawing:

Figure l is a view in vertical sectional elevation of a gas-fired boiler-furnace employing my invention. A

Figure 2 is a plan View of the furnace of Fig. l, the cap or hood at the top of the G0 furnace being omitted.

upwardly through the water in the boiler l of the boiler section 5. Another object is to provide a furnace em- 1931.V Serial No. 529,869.

Figure 3 is an enlarged broken view in vertical sectional elevation through one of the gas-fines of the furnace;

Figure l is a section taken `at the' line l on Fig. 3 and viewed in the direction of the 55 arrow, the vertical bar of the carrier therein shown being omitted; and

Figure 5, abroken enlarged fragmentary view in sectional elevation of a detail of the boiler construction. 60

Referring to the particular construction shown in the drawing, wherein I have illust-rated my invention as embodied in a gasiired boiler furnace the general features of which are of well-known construction, 5 represents the boiler section of the furnace the top and bottom plates of which are indicated 6 and?, respectively, the boiler section surmounting a hollow leg-equipped base 8 in which the gas-burner structure represented at 9 is located and the boiler section 5 being surmounted by a dome-like capi() opening at its center, as indicated at l1, into a stack 12 v The furnace also comprises a group of substantially vertically disposed heating flues, in the form of pipes 13 which communicate at their lower ends with the space below the y bottom plate 7 of the boiler section 5, extend section 5, (the water level by way of example and in the Vcase, of a steam boiler, being represented at 14) and communicate at their upper ends with the space above'the top plate 6 8f J The iiues 13 the cross-sectional areas of which are relatively great are provided with means which serve to reduce the effective cross-sectional areas of the flues providing spaces for the travel of the gases upwardly 9U through the flues to effect a scrubbing action on the gases and providing extended heating surfaces which become heated by the gases and by contact with the walls of 'the flues .13 transmit heat, by conduction, to the walls of the fines, whereby the fiues ofrelatively large cross-sectionalfarea are caused to effect v the desired retardation of the How of the hot gases therethrough and by the extended heating surfaces provided and their conduc- 109 tive relation to the walls of the iiues, utilize to the maximum degree the heat produced by the burning gas.

In accordance with the preferred illustrated embodiment of my invention, the means referred to comprise a carrier structure iii each flue 13 shown as comprising a fiat bar 15 provided at its lower end with a head 1G of general cross-form to the center of which the bar 15 is secured, at ears 17 onthe head, by a pin 18, these means also comprising heat-conducting material 19 forming extended heat-absorbing surfaces supported on the head 16 and presenting interstices through which the gases pass, this material, by way of example and preferably, comprising metal links such as chain links preferably provided as separate links or sections of link-chains, filling the space between the bar 15 and the side wall of the flue and in contact therewith.

Extending across the top of the material 19 is a perforated disk 20 and through which the bar 15 extends, a pin 21 inserted into one of a series of openings 22 in the bar 15 holding the disk against outward movement. vThe upper ends of the bars 15 extend above the plate 6 and receive rods 23 inserted through openings in the upper ends of these bars to position the carriers at the desired height in the flues, the rods 23 restingV on the top of the boiler section 5.

PreferablyI provide means forpreventmg the displacement of the carrier sections and the material 19 should tlie furnace structure be inverted in shipping or handling, the capsection 10 being shipped separately from the remaining structure, these means in accordance with the particular construction shown comprising angle irons 25 which extend crosswise ofthe rods 23 and are clamped down against these rods at the outer edges of the flanges of the angle irons 25 in any suitable way, as for example by nuts 26 screwed upon the upper ends of studs 27 projecting upwardly from the plate 6 and through apertures in the angle irons 25. The members 25 thus not only serve to liold the carriers and the material 19 against displacement toward the upper ends of the tubes, but prevent lengthwise displacement of the rods 23 relative to the carriers.

As will be understood from the foregoing, the carriers are inserted to position in, and withdrawn from, the flues through the tops thereof, the parts being preferably so constructed and arranged that the material 19 extends slightly below the water line 14 thereby to avoid danger of undesirable hot-spots and corrosion in the flues above the water line or steam backed flue surfaces.

While I have illustrated and described a particular construction embodying my invention, I do not wish to be understood as intending 'to limit it. thereto as the same may be variously modified and altered without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a furnace, the combination with the iv* upwardly extending fines vthereof through whichV the liot gases of combustion pass, of vcarriers insertable into the flues through ends thereof, a body of heat-conducting material on each carrier and in heat-conducting contact with the wall of the iiue, means for positioning said carriers in the flues and comprising a rod extending through said carriers crosswise thereof, and means engaging said rod for preventing displacement of said carriers lengthwise ofV said iiues and lengthwise displacement of said rod.

2. In a furnace, the combination with the upwardly `extending iiues thereof through which the hot gases of combustion pass, of carriers insertable into the flues through ends thereof, a body of heat-conducting material on each carrier and in heat-conducting contact with the wall of the flue, means for positioning said carriers in the flues and comprising rods extending crosswise of said carriers, angle irons engaging at the edges of their flanges with said rods for holding the latter against upward and lengthwise displacement, studs on the upper part of the stationary part of the furnace structure, and nuts engaging said studs for clamping said bars against said rods.V

3. In a furnace, the combination with the A upwardly extending iiues thereof through which the hot gases of combustion pass, of carriers insertable into the flues through ends thereof, a body of heat-conducting material on eacli carrier and in heat-conducting contact with the wall of the flue, said carriers bemg arranged in series, means for positioning said carriers in the flues comprising rods each of which passes through a series of said carriers and crosswise of the latter, and means engaging said rods for vpreventing' displacement of said carriers lengthwise of said iues and lengthwise displacement of said rods.

4. In a furnace, the combination with the upwardly extending fl-ues thereof through which the hot gases of combustion pass, of

carriers insertable into the flues through ends thereof, a body of heat-conducting material on each carrier and in'heat-conducting contact with the wall of the flue, said carriers being arranged in series, means for positioning which the hot gases of combustion pass, of carriers insertable into the iues through ends thereof, a body of heat conducting material on each carrier and in heat-conducting contact with the Wall of the flue, said carriers being arranged in series, means for positioning said carriers in the lues comprising rods each of which passes through a series of said carriers and crosswise of the latter, said rods ORLIN N. SELLERS.

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